heilmann



(No Model.) 2 Sheets-Sheet 1.

J. J. HEILMANN OIL AND GAS ENGINE.

No. 593,296. Patented Nov. 9, 1897.

WITNE 5555 2 Sheets-Sheet 2.

(No Model.)

J. J HEILMANN. OIL AND GAS ENGINE.

Patented Nov. 9, 1897.

II If! 47/ s E S s E u n M II m: NORRxs PETER cul wnma-umo WASHINGTON, n. c.

* UNITED STATES PATENT OFFICE.

JEAN JACQUES HEILMANN, OF PARIS, FRANCE.

OIL AND GAS ENGINE.

SPEGIFICATION forming part of Letters Patent N 0. 593,296, dated November 9, 1897.

Application filed February 17, 1897. Serial No. 623,887. (No model.) Patented in France December 26, 1895, No. 252,742; in Belgium July 6,1896,No. 122,364; in England July 9,1896, No. 15,197; in Switzerland July 11,1896,No.12,687; in Hungary August 11, 1896,170. 6,769, and in Austria August 11, 1896,110. 3,373/46.

To all whom it may concern.-

Be it known that I, J EAN JACQUES HEIL- MANN, engineer, a citizen of the French Republic, residing at 19 Rue Cambon, Paris, in the Department of Seine, France, have invented certain new and useful Improvements in Oil and Gas Engines, of which the following is a specification.

This invention has been patented in the following countries: France, No. 252,742, dated December 26, 1895; Belgium, No. 122,364, dated July 6, 1896; Great Britain, No. 15,197, dated July 9, 1896; Switzerland, No. 12,687, dated July 11, 1896; Hungary, No. 6,769, dated August 11, 1896, and Austria, No. 3,373/46, dated August 11, 1896.

This invention relates to gas and oil engines of the four-cycle type, and has for its objects the equilibrium of the moving parts and a more uniform motion without employing a very heavy fly-wheel. The desired equilibrium is obtained by employing six cylinders arranged symmetrically two and two, with reference to a perpendicular plane through the middle of the crank-shaft. The pistons in these cylinders act upon cranks constructed or arranged at an angle of one hundred and twenty degrees between them. Figures 1, 2, 3, and4show, in plan and crosssection, respectively, in the accompanying drawings, two forms of the arrangement of the cranks, both of which give equilibrium. As shown in Figs. 1 and 2, the cranks 1 and 6, 3 and 4, and 2 and 5 are arranged in the three planes, as indicated. As represented by Figs. 3 and 4, the cranks are arranged 1 and 6, 2 and 5, and 3 and 4, as shown.

Fig. 5 is a sectional side elevation, and Fig. 9 is a vertical cross-section, of a complete engine constructed according to this invention. It will be obviousthat a similar arrangement may be employed for all engines of the fourcycle type of whatever system. 0, C O O O and O are the cylinders, the piston-rods of which act upon the cranks 1 and 6.

A, Fig. 6, is a shaft which is geared to ro tate at one-half of the speed of the crankshaft and which operates the valves. In each cylinder there is one explosion after every two revolutions of the cran k-shaft,which thus receives three impulses for each complete revolution, and these impulses succeed each other in the manner which gives the most uniform movement.

In the case of the arrangement of thecranks illustrated by Figs. 1 and 2, which are supposed to rotate in the direction indicated by the arrow, Fig. 2, the explosions occur in the following order, the cylinders being numbered to correspond with the cranks: 1 2 3 6 5 4; or, in other words, the explosion in cylinder 1 is succeeded by that in cylinder 2, then in cylinder 3 during the first revolution of the crank-shaft. During the second revolution an explosion first occurs in cylinder 6, then in cylinder 5, and, lastly, in cylinder 4. The cycle is repeated in the following revolutions, so that for each rotation of the shaft through one hundred and twenty degrees there is one impulse. If the explosions follow each other in either of the orders given below, the result will also be the same:

In the case of the shaft shown in Figs. 3 and 4 the explosions may followeach other in either of the orders given below:

To obtain this result, the. valve-shaft A may be constructed in the following manner: The six eccentrics are arranged at sixty degrees apart, and the order in which they succeed each other is determined by the order in which the explosions in the cylinders are to follow each other.

The valve-shaft to be used for the arrangement of the crank-shaft represented by Figs. 1 and 2 for explosions having the order 1 2 3 6 5 4 is shown in plan and cross-section, respectively, by Figs. 7 and 8. In the same way the valve-shaft corresponding with the crankshaft illustrated by Figs. 3 and 4 and explosions having the orders given with relation to that shaft is illustrated by Figs. 9 and 10.

In explosion-engines where the explosive mixture is electrically ignited the arrangement indicated by Fig. 11 may be employed.

An insulated disk D is arranged upon the valve-shaft and carries an insulated ring 0, which is electrically connected by a brush or rubbing contact with the secondary wire of an induction-coil B. There is a contact-piece on the ring or connected therewith, which touches successively in one revolution all the fixed contact-pieces P to P Each of these is in electrical communication with the ignition-chamber of one of the cylinders, in which a spark is thus produced at the proper in-' stant. The chambers are also connected to the secondary coil. the primary circuit of the induction-coil will include a source of electric current.

It will be understood that the use of a separate valve-shaft is not essential, and that other well-known methods and arrangements may be employed in such a manner as to determine the order of explosions, as hereinbefore described.

Having now particularly described and ascertained the nature of my said inventiomand in what manner the same is to be performed, as communicated to me from abroad,I declare that what I claim is- 1. An explosive-engine of the four-cycle type, comprising a crank-shaft having six cranks arranged symmetrically two and two on either side of the middle of said shaft, a cylinder for each crank, and valve-gear arranged to give a succession of six explosions at regular intervals, the first three during one revolution and the next three during the next revolution, occurring in the reverse order of It will be understood that with six cylinders, of two sets of cranks, set I one hundred and twenty degrees apart, a valve-shaft geared to rotate at one-half the speed of the crank-shaft and carrying six eccentrics set sixty degrees apart and admitting the charges to the six cylinders in a given order during two revolutions of the crankshaft, an electrical contact rotating with the eccentric-shaft, six fixed contacts cooperating with the rotating contact and each connected with the ignition-chamber of one of said cylinders, and an induction-coil whose seconda'ry is in multiple circuit with all of said chambers and fixed contacts, substantially as de scribed.

In testimony that I claim the foregoing as my invent-ion I have signed my name, in presence of two witnesses, this 3d of February, 1897.

JEAN JACQUES HEILMANN.

\Vitnesses HENRY DAWLES, A. CBESPIN. 

